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MPEG-4 Book, The by Touradj Ebrahimi, Fernando Pereira

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10.1. Introduction to Speech Coding

In contrast to general audio coders for natural audio signals, speech coders are usually expected to handle human voice as an input signal. This means that a model-based signal analysis and synthesis can be used in a highly efficient manner. The most common and widely used model-based speech analysis system is linear predictive (LP) analysis, also known as linear predictive coding (LPC). In LPC analysis, a speech signal is decomposed into two components: a set of LP coefficients and a prediction error signal (residue). The LP coefficients allow the construction of an analysis filter, which removes short-term correlation in the speech signal and provides a prediction error signal. In this analysis, a speech ...

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